Hi Marti,
I'm having an accuracy problem with icclink.
I'm starting with a RGB -> CMYK device link, which accurately maps R=G=B=65535 to CMYK=0,0,0,0.
$ icctrans -w -l CHP410-1200-link-i4-kx.icm little cms ColorSpace conversion calculator - v1.7
Enter values, 'q' to quit R (0..65535)? 65535 G (0..65535)? 65535 B (0..65535)? 65535
C=0.00 M=0.00 Y=0.00 K=0.00
Now I generate an output profile from this device link:
$ icclink -x -t0 -c2 -o out.icm \
"*Lab" sRGB.icm CHP410-1200-link-i4-kx.icmWhen I check the resulting profile, then it does not map L*a*b* = 100,0,0 to CMYK=0,0,0,0, but to 4.86,1.70,4.87,0.30.
$ icctrans -o out.icm -i "*Lab" -w little cms ColorSpace conversion calculator - v1.7
Enter values, 'q' to quit L*? 100 a*? 0 b*? 0
C=4.86 M=1.70 Y=4.87 K=0.30
Basically I had expected that iclink would place a grid point at L*a*b* = 100,0,0 such that at least white gets mapped very accurately, does it?
Though this inaccuracy is not extreme (approx. 1.5dE), this is a problem for me, since the consequence is, that the printer prints a very light shade over the complete page instead of keeping a blank page unprinted, as one would expect.
Thanks, Gerhard
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